Cutting-off saw and the like.



G. GORTON. CUTTING OPP SAW AND THE LIKE. APPLICATION FILED MAR. 19,1912.

1 ,O47,205, Patented Dec. 17,1912.

2 SHEETS-SHEET 2.

G. GORTON. CUTTING OFF SAW AND THE LIKE.

APPLICATION FILED MAR. 19, 1912.

Patented Dec. 17,1912.

2 SHEETS-SHEET 1.

GEORGE GORTON', or RAcINn, WISCONSIN.

CUTTING-OFF SAW Ann inn LIKE.

Specification of Letters ZPatent.

Patented Dec. 1'7, 1912.

Application filed March. 19, 19121 Serial No. 684,882.

To all whom it may concern Be it known that I, GEORGE GORTON, a citizenof the United States, residing at Racine, in the county of Racine andState of Wisconsin, have invented certain new and useful Improvements inCutting-O1f Saws and the Like, of which the following is aspecification.

This invention relates to certain improvements in cutting-01f saws, andthe like; and the'obje'cts and nature of the invention will be readilyunderstood by those skilled in the art in the light of the followingexplanation of the accompanying drawing showing what *I now believe tobe the preferred embodiment from among other formations, constructionsand arrangements within the spirit and scope of my invention.

It is an object of the invention to provide a rotary saw blade with aremovable cutter ring having pockets receiving insertible cuttersusually of so-called high speed or high duty steel or alloy andremovably fixed'in said pockets, the blade and ring being relativelyformed to lock together in such a manner that the blade will sustain thethrust of the cutters when in action, and yet so that the ring with itscutters can be read ily removed bodily or as a whole for cuttersharpening or other purposes, without removing the cutters from thering, whereby a number of such rings having insertible cutters can bekept onhandfor use in the one blade permitting a ring with dull cuttersto be removed from the blade and another ring with previously sharpenedcutters to be quickly inserted and locked therein with a resultingeconomy in the operation of cutting ofi machines due to the time savedin removing and replacing cutters.

A further object of the invention is to provide an improved cutting-01fsaw comprising a blade, disk or holder having a central opening, and acutter ring or annulus removably fitted and fixed to said blade andaround said opening and provided with and carrying insertible cuttersremovably fixed thereto and removable from and applicable to the bladewith the ring, for the production of a saw for economical severing ofsteel and other bars of moderate diameter cold at moderate speeds andfeeds and with the formation of a comparatively narrow kerf.

The invention consists in certain novelfeatures in construction and incombinations and arrangements as more fully and particularly set forthhereinafter.

Referring to the. accompanying drawings;Figure 1, is an elevation of asaw constructed in accordance with my invention., Fig. 2, is a detailsection on the line 22, Fig. 3. Fig. 3, is an elevation of a portion ofthe structure of Fig. 1, on an enlarged scale. Fig. 4, is a section onthe line 1- 4, Fig. 3. Figs. 5, 6, and 7 illustrate other forms of theinvention.

In the structure of Fig. 1, I show a saw blade or disk 1, adapted to besecured around its outer edge portion to any suitable rotary drivingdrum or holder. This blade is formed with a central work receivingopening, and in the particular example illustrated, the edge of theblade around said opening is formed of an annular series of similaruniformly-spaced inclined circumferentially arranged abutments o'rwedging edge portions or surfaces 10, and intervening abrupt shoulders11, between or connecting the high and low ends of the abutments orwedging edge portions. The cutting elements are carried by a flatcutterring or annulus 2, formed to fit within the central opening of theblade and to be removably locked in driving thrust sustaining anddistributing relation thereto.

In the particular examples illustrated, the outer surrounding edge ofthis ring is formed by an annular series of similar uniformly spacedcircumferentially arranged inclined abutments or wedging edge portionsor surfaces 20, and intervening shoulders or portions 21, between andconnecting the high and low ends of said inclines 20. The inclines 20,correspond to the inclines or aforementioned surfaces 10, of the bladeand are formed to longitudinally fit the same. The outer surroundingedge of the ring'is formed to interlock with the inner surrounding edgeof the blade against lateral deflection or displacement when the ring isin locked position in the blade. This result is usually accomplished bylongitudinally and centrally grooving one edge and beveling the sidefaces of the opposite edge to form a corresponding projection to entersuch groove, say about as shown in the drawings, although I do not wishto so .limit my invention. The said corresponding edges of the ring andblade, in the examples shown, are so formed that the ring can be slippedlaterally into the central opening of the blade and into the plane ofthe blade and can then be locked thereto by a rotary or axial movementof the ring within the blade, in a direction opposite to the directionof rotation of the saw, to bring the inclines 20, of the ring intolongitudinal wedging engagement with the inclined surfaces 10, of theblade. These wedging abutting inclines are preferably so arranged as tosustain the thrust of the cutters in action and relieve the ring ofundue strain by transmitting the same to the blade, yet without sotightly wedging the ring in the blade as to cause buckling or collapseof the ring or causing the ring to become so tightly wedged or jammed inthe blade as to prevent forward loosening rotation of the ring intheblade for removal of the ring.

In the particular examples illustrated, I provide means for preventingaccidental or abnormal loosening rotation or movement of the ring withinthe blade. I can economically, conveniently, and efliciently accomplishthis result by locating a locking plug, filler or rivet in one or moreof the clearance openings 12, formed between the abrupt shoulders ofthering and blade when the ring is in locked position. This lockingfiller'or rivet 13, can be formed by somesoft readily applied andremoved metal, such as tin or some suitable comparatively soft alloy.The cutter ring is provided with a series of uniformly-spaced cutterpockets or sockets opening at their inner ends through the inner edge ofthe ring. The number of pockets is preferably equal to the number ofinclined surfaces 10, at the outer edge of the ring and usually eachpocket is arranged opposite or is backed by an incline or abutment 20.Each pocket extends across the ring but not completely therethrough andthe out-er end of the pocket is closed so that the ring is comparativelynarrow and preferably flexible or elastic at those portions interveningbetween the inclines 20 and the floors of the pockets. The pockets canbe shaped or formed to detachably receive any suitable form orconstruction of inserted cutters. I preferably employ so-called highspeed or high duty cutters, composed ofsteel or other alloy.

In the particular example illustrated, by Fig. 1, the ring is formedwith slightly tapered grooved-edge pockets 22 ,to receive and becompletely filled by inserted cutters 3, slightly tapered orwedge-shapedto wedge and lock in the pockets when driven longitudinallythereinto with the points 23, of the cutters projecting into thework-receiving opening. The edges of the cutters are shown V-shaped' toform ribs to enter the grooved edges of the pockets and thereby lock thecutters against lateral displacement, al-

though I do not wish to so limit my invention.

The formations of the ring and blade are such that when the cutters arein action there is a tendency to tighten up the ring or to slightlyreduce the internal diameter of the ring and thereby tightly pinch,grip, or lock the cutters in the ring. This pinching action on theinserted cutters results from the slight flexibility of the ring at thenar row portions thereof beyond the floors of the pockets in connectionwith the wedging of the inclined abutments of the blade exerted on theportions of the ring that ride up on said abutments.

The employment of a comparatively flexible ring avoids expensiveaccuracy in the construction of the ring and cutters and permits the useof comparatively small pieces of expensive material to form orconstitute the cutters, and avoids the use of expensively formed cuttersand locking wedges therefor. The blade, ring and cutters can beinexpensively constructed. Furthermore, said blade, ring and cutters canbe made comparatively thin or narrow to very economically work atmoderate speeds in severing steel and other bars of moderate diameterwith the formation of a kerf of minimum width. The blade, ring andcutters can be made, assembled and operated for certain kinds of work ata minimum expense.

A stock or considerable number of cutter rings fitted with insertedcutters can be kept on hand for each cutting off machine in use. Thecutters of these rings in stock can be kept sharpened. Means will bepreferably provided to sharpen all the cutters of a ring while fixed inthe ring.

Whenever the cutters in use in the ma chine need replacing or becomedull, it is a simple matter requiring but a very few minutes, to removethe ring with its dull cutters from the blade and insert in the blade aring from stock having sharp cutters, and that without disturbing theblade or removing the same from its drum. The dull cutters of the ringsremoved can be resharpened and the ring replaced in stock. By thismethod, the running or operating time of the cutting off machine isincreased to the maximum, inasmuch as cutters dull rapidly and requirefrequent sharpening or replacing in the operation of modern cutting-01fmachines, and cutter maintenance constitutes a heavy expense in theoperation of such machines.

If so desired, the cutter ring might be formed with cutter pockets 6, toreceive cutters 7, somewhat reduced with respect to the size of thepockets and adapted to be removably secured and locked in such pocketsby casting soft metal 8, between the edges of the cutter and edge wallsof the pocket, see Figs. 6 and 7. For instance, the edge walls of thepocket can be longitudinally grooved, see 60, and the edges of thecutter correspondingly grooved see 70, whereby the molten soft metalwill flow into the grooves and on cooling will form keys in the ring andcutter edges locking the cutter against lateral deflection. When castingthe locking soft metal in the pockets and around the cutters, thecutters will be held with their rear edges abutting and attaining a firmbacking against the rear edge walls of the pockets.

Any suitable low melting point, or other soft metal can be used for thepurpose, that will firmly lock the cutters in the ringand yet permitremoval of the locking metal and release of a cutter when cutterreplacement or renewal is necessary. This method of locking the cuttersis comparatively inexpensive and permits use of comparativelyinexpensive sizes of high duty cutters and does not require expensiveaccuracy in construction.

The cutter rings might have their inserted cutters 9, secured in thering pockets 91, by wedges 90, each pocket having a wedge 90,longitudinally driven thereinto behind and backing the cutter in suchpocket, see Fig. 5, although such construction would be expensive incomparison with and possibly not so advantageous as the structureshereinbefore described.

I do not wish to limit all features of my invention to any particularmeans for or manner of removably securing or locking the ring carryinginserted cutters in or to the blade, nor do I wish to limit the broadfeatures of my invention to any particular construction or form ofinserted cutters or locking means therefor.

I do not herein broadly claim a saw blade having acentral-work-receiving opening with a removable cutter ring fitted insaid opening, the ring and blade edge having series of cooperatingabutting wedging or other locking surfaces, nor do I herein claim a softmetal or removable filler be tween a saw blade and a removable cutterring to prevent loosening movement of the ring within the blade, asclaims based on said structures are made in my co-pending applicationfiled May 27, 1911, S. No. 629,818, for rotary metal cutting-offdevices.

It is evident that various changes, variations and modifications mightbe resorted to in the forms, constructions and arrangements describedwithout departing from the spirit and scope of my invention as set forthin the annexed claims and hence I do not wish to limit myself to theexact disclosure hereof.

driven thereby and provided with cutter pockets opening through itsinner edge, and inserted cutters fixed in said pockets and carried bysaid ring. 2. A blade having a central work receiving opening, aremovable cutter ring in said opening and locked to and backed anddriven by said blade and provided with and carry ing inserted cuttersfixed in said ring.

3. A blade having a central work receiving opening, the edge of theblade around said opening forming inclined wedging abutments, and acutter ring provided with inserted cutters fixed therein and projectinginwardly therefrom, said cutter ring adapted to be removably fitted insaid opening and having portions to ride on said abutments.

4. A blade having a central work receiving opening formed with edgeabutments about said opening, and a cutter ring fitted in said openingand engaging said abutments and removably locked to the blade, said ringhaving inwardly opening cutter pockets and provided with cutters fixedin said pockets and carried by and removable with the blade.

5. A rotary carrier having a central work receiving opening and inclinedor wedging edge portions around said opening, and a cutter ring arrangedin said opening and having outer edge portions to ride on said inclinededge portions to removably lock and wedge the ring in the carrier, saidring formed with cutter pockets and provided wit-h inserted cuttersfixed in said pockets and carried by and removable from and applied tosaid carrier with said ring.

6. A rotary driving member having a central work receiving opening andabutments about said opening, and a cutter ring having inwardly openingcutter pockets and inserted cutters fixed therein, said ring adapted tobe removably fitted and locked in said opening in engagement with saidabutments, said ring being compressible in action to more firmly lockthe cutters therein.

7. A rotary driving member having a central work receiving opening andformed with a series of inclines about said opening, and a compressiblecutter ring having inserted cutters secured therein and projectinginwardly therefrom, said ring adapted to be secured and locked in saidmember about said opening and at its out-er edge having portions to rideand be backed by said inclines.

8. A rotary driving member having a central work receiving opening, anda cutter ring fitted in said opening and removably locked to said memberand provided with inserted cutters secured therein and projectinginwardly therefrom.

9; A rotary driving member having a work receiving opening, a cutterring having cutter pockets extending partially therethrough and openingthrough the inner edge thereof, and inwardly-projecting inserted cutterssecured in said pockets, means being provided whereby said ring isremovably locked in said member and around said opening and whereby saidring is compressed when in action to exert looking or clamping pressureon said cutters.

10. A fiat approximately flexible cutter ring having cutter pocketsopening through one edge thereof and extending partially through thering toward the opposite edge thereof, inserted projecting cutters insaid pockets, and locked to and carried by said ring, and a rotarydriving member removably receiving said ring.

- by said abutments of said member, and inserted cutters secured in saidring and carried thereby.

In testimony whereof I aflix my signature in presence of two witnesses.

GEORGE GORTON.

Witnesses E. S. GERE, C. G. ERLANDSON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of latents, Washington, D. C.

